segment
Plane figure contained by a straight line and part of the circumference of a circle: a segmental arch is therefore the shape of a segment, formed by its center far below the springing-line. (Curl & Wilson, 2016)
Plane figure contained by a straight line and part of the circumference of a circle: a segmental arch is therefore the shape of a segment, formed by its center far below the springing-line. (Curl & Wilson, 2016)